The US Army built a small complex of buildings, including two storage sheds and a barracks, south of the ranch house in 1943 as the transit base for the radar station situated on another part of the island. The buildings became property of Vail & Vickers after the war, and all but one were removed. The Vails used this remaining building for storage.

For more detailed historical information and citations, please refer to the Historic Resource Study: Island Legacies - A History of the Islands within Channel Islands National Park